Do you mean the Naval Organization Tab?
There are 2 guides in the Advanced Tactical Command Academy sub-forum that I know of
since I wrote one of them. There's probably a Youtube guide or two as well.
If you want to create a mobile Task Force with its own commander and supporting staff officers, you need to make a ship with Flag Bridge on it. Then create the new TF, assign officers to it, and then use the Transfer To Ship button to move it from Earth to a ship with a Flag Bridge. Now the TF will be able to move around the galaxy.
Remember that you need to switch the TGs from the default TF to the new TF, either via Naval Organization Tab or the drop-down menu in the top part of the TG window.